Hi, I have had some conflicting advice and would be grateful for some info from those that know about these things.... I have a J&S warm air unit in the utility room. The flue goes up through the ceiling, runs through the airing cupboard (boxed in) and then runs up through the loft (all open) and out of the roof. My neighbours gas engineer told them that we need to expose the flue in the airing cupboard to meet the new regulations. However, the BG engineer that inspects our system every year has told me that this is not required as my boiler falls outside of the new regulations - he says that it is only sealed units and not my type of boiler that it applies to. I just wondered who is correct here. Thank you very much indeed.